$ git clone -n https://src.fedoraproject.org/rpms/chemtool.git /var/lib/mock/f45-build-5425-339/root/chroot_tmpdir/scmroot/chemtool
Cloning into '/var/lib/mock/f45-build-5425-339/root/chroot_tmpdir/scmroot/chemtool'...
$ git fetch origin bab8fcaa13a9bcd7905389657e9b98ee3e274a73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chemtool
 * [new ref]         bab8fcaa13a9bcd7905389657e9b98ee3e274a73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bab8fca Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild