$ git clone -n https://src.fedoraproject.org/rpms/rust-libcramjam.git /var/lib/mock/f41-build-857024-167860/root/chroot_tmpdir/scmroot/rust-libcramjam
Cloning into '/var/lib/mock/f41-build-857024-167860/root/chroot_tmpdir/scmroot/rust-libcramjam'...
$ git fetch origin 2c73fefb1c7ba931f4f75b12f75e9006cd45f293:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libcramjam
 * [new ref]         2c73fefb1c7ba931f4f75b12f75e9006cd45f293 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c73fef Update brotli to 7.x