$ git clone -n https://src.fedoraproject.org/rpms/kcalc.git /var/lib/mock/f41-build-860446-168945/root/chroot_tmpdir/scmroot/kcalc
Cloning into '/var/lib/mock/f41-build-860446-168945/root/chroot_tmpdir/scmroot/kcalc'...
$ git fetch origin 971b3b82dc5035c54896d708eeea7a2f54309357:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kcalc
 * [new ref]         971b3b82dc5035c54896d708eeea7a2f54309357 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 971b3b8 24.08.2