$ git clone -n https://src.fedoraproject.org/rpms/gtksourceview2.git /var/lib/mock/f45-build-13184-447/root/chroot_tmpdir/scmroot/gtksourceview2
Cloning into '/var/lib/mock/f45-build-13184-447/root/chroot_tmpdir/scmroot/gtksourceview2'...
$ git fetch origin 96d30e154bc22d0322f9ecb22f5bb36a17f4f3c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtksourceview2
 * [new ref]         96d30e154bc22d0322f9ecb22f5bb36a17f4f3c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96d30e1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild