$ git clone -n https://src.fedoraproject.org/rpms/golang-github-dlclark-regexp2.git /var/lib/mock/f45-build-11869-435/root/chroot_tmpdir/scmroot/golang-github-dlclark-regexp2
Cloning into '/var/lib/mock/f45-build-11869-435/root/chroot_tmpdir/scmroot/golang-github-dlclark-regexp2'...
$ git fetch origin 3dc7736bfe17d738553eae7cc669eff6d723166c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-dlclark-regexp2
 * [new ref]         3dc7736bfe17d738553eae7cc669eff6d723166c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3dc7736 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild