$ git clone -n https://src.fedoraproject.org/rpms/libdmtx.git /var/lib/mock/f45-build-16066-481/root/chroot_tmpdir/scmroot/libdmtx
Cloning into '/var/lib/mock/f45-build-16066-481/root/chroot_tmpdir/scmroot/libdmtx'...
$ git fetch origin 79fe2483f7998187869512cd790612545fa76539:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdmtx
 * [new ref]         79fe2483f7998187869512cd790612545fa76539 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79fe248 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild