$ git clone -n https://src.fedoraproject.org/rpms/rust-sha1collisiondetection.git /var/lib/mock/f40-build-757328-119345/root/chroot_tmpdir/scmroot/rust-sha1collisiondetection
Cloning into '/var/lib/mock/f40-build-757328-119345/root/chroot_tmpdir/scmroot/rust-sha1collisiondetection'...
$ git fetch origin 20911ecee820fb1d8d0a582e1871d244d3f5fba2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sha1collisiondetection
 * [new ref]         20911ecee820fb1d8d0a582e1871d244d3f5fba2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20911ec Rebuild with cargo2rpm v0.1.14 to fix subpackage dependencies