$ git clone -n https://src.fedoraproject.org/rpms/samcoupe-rom.git /var/lib/mock/f45-build-35575-696/root/chroot_tmpdir/scmroot/samcoupe-rom
Cloning into '/var/lib/mock/f45-build-35575-696/root/chroot_tmpdir/scmroot/samcoupe-rom'...
$ git fetch origin 97049f27acfa6502c4319458ced9aec30192dae6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/samcoupe-rom
 * [new ref]         97049f27acfa6502c4319458ced9aec30192dae6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 97049f2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild