$ git clone -n https://src.fedoraproject.org/rpms/libomemo-c.git /var/lib/mock/f45-build-16684-490/root/chroot_tmpdir/scmroot/libomemo-c
Cloning into '/var/lib/mock/f45-build-16684-490/root/chroot_tmpdir/scmroot/libomemo-c'...
$ git fetch origin f31bdee8a85bdae2cf85c1ede9eb4d177ef20498:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libomemo-c
 * [new ref]         f31bdee8a85bdae2cf85c1ede9eb4d177ef20498 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f31bdee Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild