$ git clone -n https://src.fedoraproject.org/rpms/golang-github-jtolds-gls.git /var/lib/mock/f45-build-12108-437/root/chroot_tmpdir/scmroot/golang-github-jtolds-gls
Cloning into '/var/lib/mock/f45-build-12108-437/root/chroot_tmpdir/scmroot/golang-github-jtolds-gls'...
$ git fetch origin bb4faa2d7146661acf894c764966587b38e58e43:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-jtolds-gls
 * [new ref]         bb4faa2d7146661acf894c764966587b38e58e43 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb4faa2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild