$ git clone -n https://src.fedoraproject.org/rpms/gnome-user-share.git /var/lib/mock/f45-build-39671-750/root/chroot_tmpdir/scmroot/gnome-user-share
Cloning into '/var/lib/mock/f45-build-39671-750/root/chroot_tmpdir/scmroot/gnome-user-share'...
$ git fetch origin 2fd75f3219b1a3dc0caad4b366c97e427cdc1afd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-user-share
 * [new ref]         2fd75f3219b1a3dc0caad4b366c97e427cdc1afd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2fd75f3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild