$ git clone -n https://src.fedoraproject.org/rpms/rhythmbox-alternative-toolbar.git /var/lib/mock/f45-build-34516-687/root/chroot_tmpdir/scmroot/rhythmbox-alternative-toolbar
Cloning into '/var/lib/mock/f45-build-34516-687/root/chroot_tmpdir/scmroot/rhythmbox-alternative-toolbar'...
$ git fetch origin 1a43be8824bb88bcc356aba17413cb259760c042:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rhythmbox-alternative-toolbar
 * [new ref]         1a43be8824bb88bcc356aba17413cb259760c042 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a43be8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild