$ git clone -n https://src.fedoraproject.org/rpms/fractal.git /var/lib/mock/f41-build-851702-166043/root/chroot_tmpdir/scmroot/fractal
Cloning into '/var/lib/mock/f41-build-851702-166043/root/chroot_tmpdir/scmroot/fractal'...
$ git fetch origin 48e9937a3532da73905475eee0f739b0393e9c99:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fractal
 * [new ref]         48e9937a3532da73905475eee0f739b0393e9c99 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48e9937 Reduce debuginfo to avoid running out of memory on builders