$ git clone -n https://src.fedoraproject.org/rpms/rust-coolor.git /var/lib/mock/f45-build-40975-778/root/chroot_tmpdir/scmroot/rust-coolor
Cloning into '/var/lib/mock/f45-build-40975-778/root/chroot_tmpdir/scmroot/rust-coolor'...
$ git fetch origin 388147f2e0481b597253eb8cf0e0c40063b32084:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-coolor
 * [new ref]         388147f2e0481b597253eb8cf0e0c40063b32084 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 388147f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild