$ git clone -n https://src.fedoraproject.org/rpms/breeze-gtk.git /var/lib/mock/f41-build-side-1-2656026-28431/root/chroot_tmpdir/scmroot/breeze-gtk
Cloning into '/var/lib/mock/f41-build-side-1-2656026-28431/root/chroot_tmpdir/scmroot/breeze-gtk'...
$ git fetch origin 6e7aee19b038c2d84b43758bfe6c004048418b8e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/breeze-gtk
 * [new ref]         6e7aee19b038c2d84b43758bfe6c004048418b8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e7aee1 6.1.90