$ git clone -n https://src.fedoraproject.org/rpms/golang-github-lestrrat-blackmagic.git /var/lib/mock/f45-build-12155-439/root/chroot_tmpdir/scmroot/golang-github-lestrrat-blackmagic
Cloning into '/var/lib/mock/f45-build-12155-439/root/chroot_tmpdir/scmroot/golang-github-lestrrat-blackmagic'...
$ git fetch origin e957f9ec5b525cd03ac4c4a114e86cfd41447337:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-lestrrat-blackmagic
 * [new ref]         e957f9ec5b525cd03ac4c4a114e86cfd41447337 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e957f9e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild