$ git clone -n https://src.fedoraproject.org/rpms/php-sabre-dav4.git /var/lib/mock/f39-build-1928643-43072/root/chroot_tmpdir/scmroot/php-sabre-dav4
Cloning into '/var/lib/mock/f39-build-1928643-43072/root/chroot_tmpdir/scmroot/php-sabre-dav4'...
$ git fetch origin 8c4d886dbf138cd011cb3f9ad1241b520fea3b70:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-sabre-dav4
 * [new ref]         8c4d886dbf138cd011cb3f9ad1241b520fea3b70 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c4d886 v4.5.1