$ git clone -n https://src.fedoraproject.org/rpms/guvcview.git /var/lib/mock/f45-build-13252-448/root/chroot_tmpdir/scmroot/guvcview
Cloning into '/var/lib/mock/f45-build-13252-448/root/chroot_tmpdir/scmroot/guvcview'...
$ git fetch origin a45f2f0978e9906953cc42c003447a40082fdb98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/guvcview
 * [new ref]         a45f2f0978e9906953cc42c003447a40082fdb98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a45f2f0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild