$ git clone -n https://src.fedoraproject.org/rpms/golang-github-google-btree.git /var/lib/mock/f45-build-11983-436/root/chroot_tmpdir/scmroot/golang-github-google-btree
Cloning into '/var/lib/mock/f45-build-11983-436/root/chroot_tmpdir/scmroot/golang-github-google-btree'...
$ git fetch origin 079453da7ccdfc809f8884830701764110336178:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-google-btree
 * [new ref]         079453da7ccdfc809f8884830701764110336178 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 079453d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild