$ git clone -n https://src.fedoraproject.org/rpms/ghc-wai-app-static.git /var/lib/mock/f39-build-2500281-61673/root/chroot_tmpdir/scmroot/ghc-wai-app-static
Cloning into '/var/lib/mock/f39-build-2500281-61673/root/chroot_tmpdir/scmroot/ghc-wai-app-static'...
$ git fetch origin 088e515e1b8b0d08dbd322f0af5361b624d25d67:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-wai-app-static
 * [new ref]         088e515e1b8b0d08dbd322f0af5361b624d25d67 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 088e515 bump release