$ git clone -n https://src.fedoraproject.org/rpms/golang-github-gobwas-httphead.git /var/lib/mock/f45-build-11956-436/root/chroot_tmpdir/scmroot/golang-github-gobwas-httphead
Cloning into '/var/lib/mock/f45-build-11956-436/root/chroot_tmpdir/scmroot/golang-github-gobwas-httphead'...
$ git fetch origin c888059e92ecf03e9df2ab05c449e72e736159e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-gobwas-httphead
 * [new ref]         c888059e92ecf03e9df2ab05c449e72e736159e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c888059 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild