$ git clone -n https://src.fedoraproject.org/rpms/log4cpp.git /var/lib/mock/f45-build-17529-501/root/chroot_tmpdir/scmroot/log4cpp
Cloning into '/var/lib/mock/f45-build-17529-501/root/chroot_tmpdir/scmroot/log4cpp'...
$ git fetch origin 4036f871a7dda1517dc60cf87d69be36dff609cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/log4cpp
 * [new ref]         4036f871a7dda1517dc60cf87d69be36dff609cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4036f87 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild