$ git clone -n https://src.fedoraproject.org/rpms/scanmem.git /var/lib/mock/f45-build-35662-698/root/chroot_tmpdir/scmroot/scanmem
Cloning into '/var/lib/mock/f45-build-35662-698/root/chroot_tmpdir/scmroot/scanmem'...
$ git fetch origin 6da726ce4fe5b9338efd049aa41f2133f950ccc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/scanmem
 * [new ref]         6da726ce4fe5b9338efd049aa41f2133f950ccc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6da726c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild