$ git clone -n https://src.fedoraproject.org/rpms/mytop.git /var/lib/mock/f41-build-side-1-3113710-39418/root/chroot_tmpdir/scmroot/mytop
Cloning into '/var/lib/mock/f41-build-side-1-3113710-39418/root/chroot_tmpdir/scmroot/mytop'...
$ git fetch origin d5e3f32ea12553efc05f496428192ec7395edb38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mytop
 * [new ref]         d5e3f32ea12553efc05f496428192ec7395edb38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d5e3f32 convert GPLv2 license to SPDX