$ git clone -n https://src.fedoraproject.org/rpms/pcmanfm.git /var/lib/mock/f45-build-21461-584/root/chroot_tmpdir/scmroot/pcmanfm
Cloning into '/var/lib/mock/f45-build-21461-584/root/chroot_tmpdir/scmroot/pcmanfm'...
$ git fetch origin dcc7e4b1a76c7dbcf1117edcac79c44bc50f670c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pcmanfm
 * [new ref]         dcc7e4b1a76c7dbcf1117edcac79c44bc50f670c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dcc7e4b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild